Child safety seat and headrest height adjustment mechanism

Abstract

The application discloses a child safety seat and a headrest height adjusting mechanism, which comprises a seat body, a headrest and a height adjusting assembly. The headrest is located on the inner side of the seat body, and the height adjusting assembly is located between the seat body and the headrest. The height adjusting assembly comprises a plurality of gear grooves arranged on the inner side of the seat body, an adjusting handle and a gear block. The adjusting handle is movably connected to the rear side of the headrest. The lower end of the adjusting handle is provided with a driving part. When the adjusting handle is pulled upward, the driving part controls the gear block to move transversely and disengage from the gear groove, so as to adjust the height position of the headrest relative to the seat body. When the adjusting handle is pulled upward, the driving part at the lower end of the adjusting handle controls the gear block to move outward and disengage from the gear groove, so as to unlock the gear block and the gear groove, thereby adjusting the height of the headrest on the seat body. The above structure is relatively simple, and the user can operate more conveniently and quickly. After the gear groove and the gear block are locked, the headrest is in a relatively stable fixed state and is not prone to loosening or deviation.

Description

TECHNICAL FIELD

[0001] The present application relates to a child safety seat, in particular to a headrest height adjustment mechanism and a child safety seat. BACKGROUND

[0002] Generally, a headrest is arranged on the inner side of the back of a child safety seat, and a height adjustment mechanism is arranged between the headrest and the back, so as to conveniently raise or lower the height of the headrest of the child safety seat for a vehicle, and when the child grows taller, the head protection position of the child seat also needs to be raised correspondingly, so that the head of the child is better protected. The headrest adjustment device of the child safety seat on the market at present is either relatively complex in structure or very inconvenient to operate.

[0003] The headrest height adjustment structure of the child safety seat of CN104875637A; the headrest height adjustment structure comprises a pressing block, a locking block and a return spring, the pressing block located at the back side of the back is connected with the headrest through a connecting piece, a longitudinal channel for the connecting piece to pass through is formed on the back, a plurality of clamping grooves evenly distributed on the side of the longitudinal channel are arranged on the back side of the back, the locking block is arranged on the inner side of the pressing block, and the return spring is located between the pressing block and the locking block.

[0004] The headrest height adjustment mechanism and the child safety seat of CN207809119U, comprising a back, a headrest and an adjustment assembly, a plurality of first gear grooves extending along the height direction of the back are arranged on the back surface of the through groove of the second gear groove back.

[0005] Therefore, the technical personnel in the art try to provide a novel headrest height adjustment mechanism. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a headrest height adjustment mechanism of a child safety seat, which is simple in structure, smooth in adjustment and good in reliability.

[0007] The technical solution provided by the present application to solve the above technical problem is: a headrest height adjustment mechanism, comprising a seat body, a headrest and a height adjustment assembly, the headrest is located on the inner side of the seat body, the height adjustment assembly is located between the seat body and the headrest, the height adjustment assembly comprises a plurality of gear grooves arranged on the inner side of the seat body, an adjustment handle and a gear block, the adjustment handle is movably connected on the back side of the headrest, the lower end of the adjustment handle is provided with a driving part, the driving part controls the gear block to move transversely to be separated from the gear groove, so as to adjust the height position of the headrest relative to the seat body.

[0008] Further preferred scheme of the present application is that the adjustment handle is in the shape of a strip, and the upper end of the adjustment handle extends out of the highest edge of the headrest, so as to facilitate the hand to pull.

[0009] The further preferred embodiment of the present application is that the driving part comprises a first inclined surface, which converts the longitudinal movement of the adjusting handle into the lateral displacement of the gear block.

[0010] The further preferred embodiment of the present application is that the gear block comprises a second inclined surface, which cooperates with the first inclined surface.

[0011] The further preferred embodiment of the present application is that the bottom of the adjusting handle is fixed with a pressing block, the driving part of the adjusting handle is limited by the pressing block so that the driving part can move up and down in a limited range, and a notch is arranged in the pressing block for the lateral movement of the gear block.

[0012] The further preferred embodiment of the present application is that a first reset spring is arranged between the gear block and the headrest, so that when the adjusting handle is released, the first reset spring drives the gear block to fall into the selected gear slot.

[0013] The further preferred embodiment of the present application is that a second reset spring is arranged between the adjusting handle and the headrest, so that when the adjusting handle is released, the adjusting handle can return to the original position.

[0014] The further preferred embodiment of the present application is that the pressing block is fixed on the rear side of the headrest through a screw assembly.

[0015] The further preferred embodiment of the present application is that two longitudinal guide slots are arranged on the headrest, and the chair body is provided with two guide columns, the guide columns pass through the guide slots, and when the headrest moves relative to the chair body, the guide columns slide relative to the guide slots.

[0016] Another preferred subject is a child safety seat comprising the headrest height adjusting mechanism.

[0017] Compared with the prior art, the height adjusting assembly of the present application comprises a plurality of gear slots, an adjusting handle and a gear block, the adjusting handle is pulled upward to control the driving part at the lower end of the adjusting handle to move outward and out of the gear slot, so as to unlock the gear block and the gear slot, thereby the height of the headrest on the chair body can be adjusted; the above structure is relatively simple, and the user can operate more conveniently and quickly, and after the gear slot and the gear block are locked, the headrest is in a relatively stable fixed state and is not easy to loosen or deviate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure diagram of a child seat Figure One ;

[0019] Figure 2 Structure diagram of the back of a child safety seat

[0020] Figure 3A side view of a child safety seat;

[0021] Figure 4 A structure diagram of a headrest in this embodiment;

[0022] Figure 5 A structure diagram of a headrest back in this embodiment;

[0023] Figure 6 A structure diagram of a child installation seat Figure Two ;

[0024] Figure 7 A partial structure diagram of a height adjustment assembly;

[0025] Figure 8 A whole structure diagram of an adjustment handle;

[0026] Figure 9 A structure diagram of a pressing block in this embodiment Figure One ;

[0027] Figure 10 A structure diagram of a pressing block in this embodiment Figure Two ;

[0028] Figure 11 A whole structure diagram of a gear block Figure One ;

[0029] Figure 12 A whole structure diagram of a gear block Figure Two ;

[0030] Figure 13 An enlarged view of A in this embodiment Figure 3 ;

[0031] Figure 14 An enlarged view of B in this embodiment Figure 5 . DETAILED DESCRIPTION

[0032] The preferred embodiments of the present application will be described in detail below with reference to the attached drawings. It will be appreciated by those skilled in the art that the description is merely descriptive, exemplary, and should not be interpreted as limiting the scope of protection of the present application.

[0033] It should be noted that similar reference numerals refer to similar items throughout the drawings, and once an item is defined in one drawing, it can not be further defined and explained in subsequent drawings.

[0034] As Figures 1 to 7As shown, the child safety seat 300 is usually installed on a family car for a baby to ride, and in order to better ensure the safety of the baby when riding, a headrest 102 is usually installed on the child safety seat 300 to better protect the head of the rider. Considering that the height of each child during the baby period is different, and the height and size of the child will change during the development process, it is necessary to adjust the height of the headrest according to the specific circumstances of different periods and different children. The height adjustment mechanism of the headrest in the prior art has problems such as inconvenient adjustment and complex structure. In view of the above considerations, the height adjustment mechanism 100 of the headrest on the child safety seat 300 will be focused on in this embodiment, as follows:

[0035] The headrest height adjustment mechanism 100 includes a seat body 101, a headrest 102, and a height adjustment assembly 200. The headrest 102 is located on the inner side of the seat body 101, and the height adjustment assembly 200 is located between the seat body 101 and the headrest 102. The height adjustment assembly 200 includes a plurality of gear grooves 10 on the inner side of the seat body 101, an adjustment handle 20, and a gear block 30. The adjustment handle 20 is movably connected to the rear side of the headrest 102, and the lower end of the adjustment handle 20 is provided with a driving part 21. Pulling the adjustment handle 20 upward, the driving part 21 controls the gear block 30 to move transversely out of the gear groove 10, so as to adjust the height position of the headrest 102 relative to the seat body 101.

[0036] The height adjustment assembly 200 includes a plurality of gear grooves 10, an adjustment handle 20, and a gear block 30. Pulling the adjustment handle 20 upward to make the driving part 21 at the lower end of the adjustment handle 20 control the gear block 30 to move outward and out of the gear groove 10, so as to unlock the gear block 30 and the gear groove 10, thereby adjusting the height of the headrest 102 on the seat body 101. The structure of the above height adjustment assembly 200 is simple, and the user is more convenient and fast when operating. In addition, the headrest 102 is in a relatively stable fixed state after the gear groove 10 and the gear block 30 are locked, and is not easy to loosen or deviate.

[0037] As shown in Figure 7 and Figure 8 , Figure 13 and Figure 14 , the adjustment handle 20 is in a long strip shape, and the upper end of the adjustment handle 20 extends out of the highest edge of the headrest 102 to facilitate hand pulling. The upper end of the adjustment handle 20 extends out of the highest edge of the headrest 102, so that the user is more convenient when pulling the adjustment handle 20 up and down, and the adjustment handle 20 is in a long strip shape, so that the user is more fast when pulling it up and down to control the unlocking and locking of the gear block 30 and the gear groove 10.

[0038] The drive unit 21 includes a first inclined surface 21s, which converts the longitudinal movement of the adjusting handle 20 into the lateral displacement of the gear block 30. Specifically, the first inclined surface 21s on the drive unit 21 is linked and cooperates with the gear block 30.

[0039] In actual operation, pulling the adjusting handle 20 causes the driving part 21 to move upward, and the first inclined surface 21s acts on the gear block 30 to push the gear block 30 laterally; that is, the driving part 21 and the gear block 30 are connected by the first inclined surface 21s, so as to realize the longitudinal movement of the adjusting handle 20 to control the lateral movement of the gear block 30; the key components of the above-mentioned adjusting mechanism are relatively simple, but can achieve a more perfect adjustment effect. Therefore, the technical solution formed by combining this technical feature has considerable creative significance.

[0040] Furthermore, in this embodiment, the gear shift block 30 includes a second inclined surface 30s, which cooperates with the first inclined surface 21s. During actual movement of the gear shift block 30 and the drive unit 21, the first inclined surface 21s acts on the second inclined surface 30s and pushes it. The presence of the second inclined surface 30s allows the gear shift block 30 to better receive the force from the first inclined surface 21s, thereby enabling the gear shift block 30 to move laterally faster and more thoroughly. This makes the unlocking or locking between the gear shift block 30 and the gear shift groove 10 more sensitive, thereby improving the smoothness of the headrest height adjustment mechanism.

[0041] It should also be noted that the outer edge of the highest point of the first inclined surface 21s of the drive unit 21 extends upward and outward by a certain distance. This upward and outward extension cooperates with the side wall of the gear block 30 to limit the maximum extent to which the adjustment handle 20 is pulled upward.

[0042] like Figure 9 and Figure 10 As shown, a pressure block 40 is fixed to the bottom of the adjusting handle 20, that is, a pressure block 40 is fixed to the drive part 21, and the pressure block 40 is fixedly connected to the headrest 102. It should be noted that the drive part 21 of the adjusting handle 20 is restricted by the pressure block 40 so that the drive part 21 can move up and down within a limited range. Specifically, the bottom of the pressure block 40 is provided with an outwardly extending limiting part, which cooperates with the bottom surface of the drive part 21 to limit the maximum degree of downward movement of the adjusting handle 20.

[0043] The pressure block 40 has a groove 41 for the shift block 30 to move laterally. It should be specifically noted that when the shift block 30 moves outward to its maximum extent relative to the groove 41, a portion of the shift block 30 is still located within the groove 41. This allows the shift block 30 to move up and down with the headrest 102 as the pressure block 40 moves, thus engaging with the shift grooves 10 of different heights on the inner side of the chair body 101.

[0044] The pressing block 40 comprises a slot which is at an angle to the notch 41, and which is used to adjust the up and down movement of the adjusting handle 20.

[0045] The gear block 30 and the headrest 102 are provided with a first reset spring Q1, so that when the adjusting handle 20 is released, the first reset spring Q1 drives the gear block 30 to fall into the selected gear slot 10. As shown in Figure 7 and Figure 8 、 Figure 13 and Figure 14 In actual operation, the user pulls the adjusting handle 20 upwards, so that the first slope 21s on the driving part 21 pushes the gear block 30 to move laterally out of the gear slot 10 and compresses the first reset spring Q1, thereby unlocking the gear slot 10 and the gear block 30, and the user can adjust the height of the headrest 102 according to actual needs; after the adjustment is completed, the first slope 21s on the driving part 21 leaves the gear block 30, and after the force applied to the gear block 30 disappears, the gear block 30 can move into the corresponding height gear slot 10 under the reset force of the first reset spring Q1.

[0046] The adjusting handle 20 and the headrest 102 are provided with a second reset spring Q2, so that when the adjusting handle 20 is released, the adjusting handle 20 can return to the original position. One end of the second reset spring Q2 is connected to the fixed column of the adjusting handle 20, and the other end of the second reset spring Q2 acts on the bottom wall of a protruding part of the headrest 102. Specifically, in actual operation, the user pulls the adjusting handle 20 upwards, so that the second reset spring Q2 is compressed between the bottom wall of the protruding part and the fixed column; when the height of the headrest 102 is adjusted, the force applied to the adjusting handle 20 is removed, and the adjusting handle 20 moves downward and returns under the action of the second reset spring Q2.

[0047] The pressing block 40 is fixed to the rear side of the headrest 102 through a screw assembly. More specifically, the pressing block 40 is fixed to the rear side of the chair body 101.

[0048] The headrest 102 is provided with two longitudinal guide slots 103, and the chair body 101 is provided with two guide columns 104, the guide columns 104 pass through the guide slots 103, and when the headrest 102 moves relative to the chair body 101, the guide columns 104 slide relative to the guide slots 103. Preferably, the outer end of the guide column 104 extends outward in a circular shape for a certain distance to form a circular limiting end, and the diameter of the circular limiting end is greater than the size of the notch of the guide slot 103, thereby avoiding the guide column 104 from coming out of the guide slot 103.

[0049] In actual application, the user can adjust the height of the headrest 102 by pulling the adjusting handle 20 upwards, and the headrest 102 can be locked at any height. Figure 12As shown, the gear block 30 can be made of light plastic material, and a plurality of reinforcing ribs 30f are arranged on the back of the gear block 30 to strengthen the strength of the gear block 30. The back of the gear block 30 is provided with installation grooves 30k for fixing the first return spring Q1.

[0050] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0051] The headrest height adjusting structure and child safety seat provided by the present application are described in detail above, and the principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the present application and the core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A headrest height adjustment mechanism, characterized in that... The device includes a chair body, a headrest, and a height adjustment assembly. The headrest is located inside the chair body, and the height adjustment assembly is located between the chair body and the headrest. The height adjustment assembly includes multiple position slots, an adjustment handle, and a position block located inside the chair body. The adjustment handle is vertically and movably connected to the rear of the headrest. The lower end of the adjustment handle is provided with a drive unit. Pulling the adjustment handle upward causes the drive unit to control the position block to move laterally away from the position slot, thereby adjusting the height position of the headrest relative to the chair body. The adjustable handle is long and narrow, with its upper end extending beyond the highest edge of the headrest for easy lifting. The drive unit includes a first inclined surface, which converts the longitudinal movement of the adjusting handle into the lateral displacement of the gear block. The gear shift block includes a second inclined surface, which cooperates with the first inclined surface. The outer edge at the highest point of the first inclined surface of the drive unit has an extension segment that extends upward and outward; A pressure block is fixed to the bottom of the adjusting handle. The driving part of the adjusting handle is restricted by the pressure block so that the driving part can move up and down within a limited range. The pressure block is provided with a slot for the gear block to move laterally. When the gear block moves outward to the maximum extent relative to the slot, at least a part of the gear block is located in the slot. A first return spring is provided between the gear shift block and the headrest so that when the adjustment handle is released, the first return spring drives the gear shift block to fall into the selected gear shift slot. A second return spring is provided between the adjusting handle and the headrest so that the adjusting handle can return to its original position when it is released; The headrest has two longitudinal guide grooves, and the chair body has two guide posts. The guide posts pass through the guide grooves, and when the headrest moves relative to the chair body, the guide posts slide relative to the guide grooves.

2. The headrest height adjustment mechanism according to claim 1, characterized in that... The pressure block is fixed to the back of the headrest by a screw assembly.

3. A child safety seat, characterized in that... Includes the headrest height adjustment mechanism as described in any one of claims 1-2.

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